build(deps): bump peter-evans/create-pull-request from 5 to 6 (#805)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 5 to 6.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v5...v6)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/refreeze-dockerfile-requirements-txt.yaml

@@ -47,7 +47,7 @@ jobs:
 
       # ref: https://github.com/peter-evans/create-pull-request
       - name: Create a PR
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           token: "${{ secrets.dask_bot_token }}"
           author: Dask Bot Account <65357765+dask-bot@users.noreply.github.com>